All this time the tide had been rising. Most of the rough, above-water rocks were submerged, and fully three feet of water washed over the concrete disk. Only the tops of the rough stones where Sanford stood, and the platform where Carleton sat, out of all danger from derricks or sea, were clear of the incoming wash.

Meanwhile the Screamer’s life-boat—the only means the men had that day of leaving the Ledge and boarding the sloop, moored in the lee of the Ledge—had broken from her moorings, and lay dangerously near the rocks. The wind too had changed to the east. With it came a long, rolling swell that broke on the eastern derrick,—the fourth one, the key-note of the system, the one Captain Joe and the men were tightening up.

Suddenly a window was opened somewhere in the heavens, and a blast of wet air heaped the sea into white caps, and sent it bowling along towards the Ledge and the Screamer lying in the eddy.

Captain Joe, as he stood with the hook in his hand, watched the sea’s carefully planned attack, and calculated how many minutes were left before it would smother the Ledge in a froth and end all work. He could see, too, the Screamer’s mast rocking ominously in the rising sea. If the wind and tide increased, she must soon shift her position to the eddy on the other side of the Ledge. But no shade of anxiety betrayed him.

The steady movement of the tugging men continued, Lonny’s “Heave ho” ringing out cheerily in perfect time. Four of the gang, for better foothold, stood on the concrete, their feet braced to the iron mould band, the water up to their pockets. The others clung with their feet to the slippery rocks.

The hook was now within two feet of the steel ring, Captain Joe standing on a rock at a lower level than the others, nearly waist-deep in the sea, getting ready for the final clinch.

Sanford from his rock had also been watching the sea. As he scanned the horizon, his quick eye caught to the eastward a huge roller pushed ahead of the increasing wind, piling higher as it swept on.

“Look out for that sea, Captain Joe! Hold fast, men,—hold fast!” he shouted, springing to a higher rock.

Hardly had his voice ceased, when a huge green curler threw itself headlong on the Ledge, wetting the men to their arm-pits. Captain Joe had raised his eyes for an instant, grasped the chain as a brace, and taken its full force on his broad back. When his head emerged, his cap was gone, his shirt clung to the muscles of his big chest, and the water streamed from his hair and mouth.

Shaking his head like a big water-dog, he waved his hand, with a laugh, to Sanford, volleyed out another rattling fire of orders, and then held on with the clutch of a devil-fish as the next green roller raced over him. It made no more impression upon him than if he had been an offshore buoy.